Set in Australia's outback, "Beautiful Kate" is a love story about the sexual awakening of three siblings growing up in isolation. Returning to the family home with his much younger fiancée Toni, Ned is forced to confront the realities surrounding the dramatic death of his twin sister Kate when she was 16. As memories from his youth come flooding back, it becomes apparent that their sibling intimacy had crossed over into a physical relationship, haunting him with the inescapable feelings of desire and guilt. On the remaining days leading to Bruce's death, a newfound tenderness grows between father and son, as feelings of anger and bitterness soon turn to forgiveness and the past that has haunted the family is finally laid to rest.